The package is installed with wrong permissions

[Uqbar]

~ umask
0077
~ sudo -s -H
# umask
0077
# apt-get install libqt3-mt
...
# ls -l /usr/local/lib/libqt-mt.so.3
-rw------- 1 root root 8061845 2010-10-20 15:03 /usr/local/lib/libqt-mt.so.3
# chmod 644 /usr/local/lib/libqt-mt.so.3

This file cannot be used by anyone but root if you don't run the last coomand (chmod).

ProblemType: Bug
DistroRelease: Ubuntu 10.10
Package: libqt3-mt 3:3.3.8-b-6ubuntu2
ProcVersionSignature: Ubuntu 2.6.35-22.35-generic 2.6.35.4
Uname: Linux 2.6.35-22-generic x86_64
NonfreeKernelModules: nvidia
Architecture: amd64
Date: Wed Oct 20 15:15:51 2010
InstallationMedia: Kubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101008)
ProcEnviron:
 LANGUAGE=
 LC_COLLATE=C
 PATH=(custom, user)
 LANG=it_IT.UTF-8
 SHELL=/bin/bash
SourcePackage: qt-x11-free

[Jonathan Thomas (echidnaman)]

The Ubuntu packages do not install the library to /usr/local, but rather to /usr/. The library you are showing is from a different source altogether:

jonathan@jonathan-laptop:~$ dlocate libqt-mt.so.3
libqt3-mt: /usr/lib/libqt-mt.so.3.3.8
libqt3-mt: /usr/lib/libqt-mt.so.3
libqt3-mt: /usr/lib/libqt-mt.so.3.3
libqt3-mt: /usr/share/qt3/lib/libqt-mt.so.3.3
libqt3-mt: /usr/share/qt3/lib/libqt-mt.so.3
jonathan@jonathan-laptop:~$